From 2000 to 2011, the incidence of several specific attack types declined. Name one such attack type, and provide a reasonable statement of why its frequency has declined.
A) SQL injection attacks, as web application security measures improved.
B) Phishing attacks, due to increased user awareness and email filtering.
C) DDoS attacks, because of advancements in network infrastructure.
D) Malware attacks, as antivirus software became more effective.
